Audio question?

For a short time I used an Alpine power pack: https://www.amazon.com/Alpine-KTP-445U-4-channel-Power-Amplifier/dp/B003VVYL46
I wired a 3.5mm connector to it so I could just plug in my phone. The probably with using just an amp is the sound quality. There's really no built-in EQ or any kind of signal processing.

Well, thanks to you guys, I ordered one of these.

Click to expand...

I've been looking at a unit like that for a different project. Let me know how it sounds.